Wrench



one side of the handle.

nnen.

WRENCH.

SPECIFICATION forming part of Letters Patent No. 520,529, dated May 29, 1894.

i Application iiled February 26, 1894- Serial No. 501.547. (No model.)

To all whom it may concern:

Be it known that I, KARL AUGUST KLosE, a citizen of the United States, residing at Richfield, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Vrenches; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

This invention has relation to an improvement in that class ot' pipe wrenches, known as' slidingjaw, and it has for its prime object to produce a wrench of a very effective and durable construction and one which may be manufactured at a comparatively small expense.

ther objects and advantages will appear from the following description and claim when taken in connection with the annexed drawings, in which-- Figure 1, is a longitudinal sectional view of my improved wrench, taken 1n the plane at Fig. 2, is a plan view with the handle partly broken away. Fig. 3, is a cross sectional view, and Fig. 4, is a perspective view of the jaw carrying the handle with a part of the handle broken away.

lReferring by letter to said drawings:.-A, indicates the outer jaw, and B, the inner jaw. The outer jaw has formed therewith or secured thereto, a frame which is adapted to receive the handle or shank of the jaw B. This frame which comprises the two parallel branches @,'and b, is provided in each branch with a slide bearing c. These slide bearings are arranged parallel and secured at a suitable distance from the lower longitudinal edges of each branch by means of studs d, or other suitable fastening devices, although in some cases, the said bearings may be formed on the branches. The jaw A, 1s preferably curved on its engaging face, as shown, and this curved face is toothed as illustrated. The parallel branches a., and b, which are iiXed with an interspace between them, are curved downwardly at their inner ends, as shown at e, and fixed to or otherwise arranged between these curved branches is a cross bar 5o f, which is beveled on its upper side as shown,

so as to engage the teeth on the stem or handle of the jaw B. v

bear against the under longitudinal edges of the branches a, and b. A handle C, is formed on the jaw B, and this handle is sufficiently narrow to pass between the branches a, and b, so as to work freely therein. The handle C, which may be of a sufficient length, is toothed for a sucient distance in its lower longitudinal edge, and begins from a point adjacent to the head or jaw B. Rising from the upper side of this jaw B, and centrally therefrom, is an ear or lug D, which may be of a width corresponding to that of the handle, and in this ear or lug is a cross pin or stud c', which projects sufficiently on either side to bear upon the slides c, of the branches a, and b. By this construction it will be seen thatthe jaw B, is allowed a slidable bearing in the branches of the jaw A, by simply raising the handle so as to disengage its teeth from the cross bar f. A spring is employed for bringing the teeth on the handle in engagement with the cross bar f. This spring may comprise a piece of steel E, spring wire, or the like, secured at its upper end between the branches of the jaw A, by means of a pin F, and this spring has an under bearing against a pin G, also arranged between said branches so that the free end of said spring will bear upon the upper side of the handle in rear of the cross-bar f.

In operation, when it is desired to adjust the jaws to grasp a pipe of any size, it is simply necessary to take hold of the jaw A, or its branches, in one hand, and grasping the handle with the other hand, press back the spring E, so as to allow the teeth of the handle to become disengaged from the cross bar f. This movement will cause the cross pin or stud z', to bear upon the slides c, and the sections can be then slid together or drawn apart to the point desired, when by allowing the spring to act again, the desired tooth in the handle bar will be brought into engagement with the cross bar of the branches a, and b, thereby securely holding the wrench upon the pipe, when by pressing upon the handle, the rounded or beveled portions h, will engage the un- IOO der sides of the branches a, and b, relieving any strain from the cross pins or studs, and Will effectively grasp the pipe and turn it or hold it as the case may be.

As a convenient construction, I would form the branch b, separately from the branch a, and the two may be secured together by bolts or the like, although the parts may be xed or secured together in many other ways.

Having described my invention, what I claim is The adjustable pipe Wrench, comprising the jaw, having the two parallel and curved branches provided on their inner sides with parallel slide bearings, and also having the cross bar arranged in the curved portion of said branches, in combination with the slid- KARL AUGUST KLOSE.

Witnesses: y

GEO. WILLsoN, H. M. PARKER. 

